Originally Posted by
uilleann
it's interesting that so many extol the vastly "superior" optics of trivex. Why not just use cr39 - which is far superior optically yet again (since it seems abbe value is the end-all be-all factor in "superior" optics here)? It's cheaper, available in every lens design, thickness isn't all that different based on a three point difference against trivex - and given that poly is a whopping 6 points towards the thinner end of things), and has superior scratch resistance as well.
Its more than just a little silly with all the perfectly viable lens material options out there, that so many other choices (yes, even including poly, used intelligently) are summarily off the table in many of the dispensaries represented above. Trivex is a fine option for some rxs - but is far from the second coming of the messiah. :tongue::redcarded::giggle: